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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a3c249f97d1f3659e1b43e0c22f9061bc77b87b523c8810beac4b0199d4ea26' 
  AND token = '8z1rnx7FKxHuU6Xvd4f/DsbI3uScoBXb94FU/tp0fnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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