Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6e7975c8b7a416030f48c6f2f60c4a5b221bb5fed8818d86f106ba9cd3e7d25' 
  AND token = 'ugH18xW21UlN89J1obpEmMPHe4yIojsG6+fFv+0No0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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