Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c2d1a65c950420f94f2352cdfa638fb6ad0a0ec8287724935e5b05bc8ee79f7' 
  AND token = 'iGGmbIDF7YNszGem2p49qIWrEf5ZUiU5qIwGBvqRaA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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