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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '010f07c93c49fdafe627dc85d9525bae06a9769a9eaf0d9d4e1c4d1744ce215d' 
  AND token = 'hguF8PCSPYh4cb4nCxMFgcgQh7OhjunWrOGKM2uVp4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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