SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5502ed20b7e36ab49cb125d3ddc366b8a8086439b9b1c66c1371fbf397c9f9c0' 
  AND token = 'Tq4ZFASc6HFlmJAWDPN+tccsZoS0zxSzUDBhLKAQxd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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