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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe74afefe0584d1f4d582b12e9383f64db1224efdd10f1166f0ce7b1834d8f75' 
  AND token = 'tu39ihFwJf21EMi7iRwnG3pLz/p0HG8nDxO5b4fmDuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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