Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '55a3102227a2c05bc2cd478ac60c47fa127cb718c3c56e75b220b4677819a7b3' 
  AND token = 'FdsMHCykH4JfHsMwRZxiNAPbdr6poAG06xxJJWOune8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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