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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '17ffa665b9230675cc2b55673f5a1929401becc1ec71adc55d85c30a2ef5f8c9' 
  AND token = '4M46MbTQkXNCpUSBNjur9yWX0oei28pvsHMMqgYvYVo=' 
  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"
    }
  }
}