Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1443aaf600484d2b20ec2155848378291e2b1dc17608c7245a6cfe94859021b6' 
  AND token = '01c0kMYp3uK+7aBFYM5VILAVj4duF+LViLNP0skbEig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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