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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcee6f7bab5ae988b8e17d9df19bf9d470cd8ae6a31f928fa2d73304cbbe71a1' 
  AND token = '+zuclCIInC5TKcs5VHsZee7T9oGAfjIdnCZXZD3713E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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