Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a1b1ba781a583fc365424a34891cc5d3ea7a356b31e151a35273daaa3cd353e' 
  AND token = 'R6D4Iozijv04RNmHHxn86RwTrcMiaDfIb4xaGfGMElY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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