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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9320d9cc6153c7ddc75cccb3fdf03f3d3c7a8ee9c95b7d11b5feaa298b7f685' 
  AND token = 'gIiB8UwOddN6ZgOQfX0dFkzkjnNlosq7AvMQ3ynzud4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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