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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a3f89d65d585c2782ff7e50f8041939f499061fa04b5893c48403e743a795e6a' 
  AND token = 'UPZULkZ9xEDCRF08RJs5MGX1eR8tinEkp0B7DLnVyB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}