Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9382f62b5904878005e0eac26e2e7274dfb4c84cfe5028723ba186853ae5b8c6' 
  AND token = '+H/42z8idSOKhPNyAwMDmCrpL8H9XXSXi6d15rdxXmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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