Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b56df9846891325ab3429b496c60c1a12b1d10a218c5a5866d55a5028b9e78df' 
  AND token = 'xXV9Dbw0RCGrDW+pKi2RR+QG+WrNZJAGS1LoW4ui2P4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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