SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79192bc11c5321d4a1d64f835cd99ff043d1e2c6ae793ab6189ce1b449772c33' 
  AND token = 'QVLFFfdB8m2T3/of0IPKSYjjyZuFxz7bg/DWk+a0+Q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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