Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f98dc2f701aa730a17655e947715487e4d6864970bf35c8c06040ef52a739c49' 
  AND token = 'FYN3YDZYJoRM0r8NCOhytihNILTqVPsNH0fIashUIps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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