Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c19f0461a996bbc8ad244fd6955da9dc1dbf31af1b955b214bbe4315ad38627' 
  AND token = 'HOraLf6mqO1VQmdhBsx2TYUmpgevx0f1KIpHKyTwf4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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