Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc541bc50862eaf3aa2cdf70e2d4e05939ddb7ef344d13e91395554d4f4e36b7' 
  AND token = 'dY/m4LIv7prDVKClUe4vpGdb4X2dOJfa3gi/ibCZlXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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