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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba1f219654fc4ec8d8a42cbea1722691c8dc13f74696388e5811fe56d207fede' 
  AND token = 'qSBeWfjIx39bJppoe8/ygftPwRQrQpBjF1irVd9iluM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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