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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cecd2a348cbddb70f374b99097878a89631214a8bd2e892da4d0d7b872db3746' 
  AND token = 'ihorZN7rqOJ7g2JPUCdGjGS9/LJRGLfj7kZGuSMnNNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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