Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa28ddad0306e34173679b630304d04137da0714994ee35b22fd27cfccb3ca25' 
  AND token = 'SqUBCCD25cTL8+aIFOcPmkcTF79OPX/Qw64ZGTbLFDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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