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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fa35d4cdd5a7285edae146bbabdd551e51fcd5404e1504a52eaecb14d535d82' 
  AND token = 'YcJ7yBhj1hX07JXaFX3AQlEXYie9m3Bzcu1hxMYv+MU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}