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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '307bee181e8423b9245bdfcbe82d073642c62fdafc794f5e171e3b222e8544b6' 
  AND token = 'O9DEho7ZU2PCD322XPSfYYuFiMFapqXrzjHLlrnt1Os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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