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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4b627de067263f8e13a7195ec78259f014ff1d067ab03ca54c6f932b3f26403c' 
  AND token = '6MPwrj1bqv3Hizbe4XKW55xtUCTgs2lENNeKGFTCOt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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