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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f410c173ed59be3c980cde7fde4a3da6f5931a60771de0fbe347c2b6dee213c7' 
  AND token = 'og65ui9unQaMQI4o4oluQh2ioD9beGxa61LsKX4jB5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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