SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '972ceafb592ff4b37f3f45b1c570b694915df12503c868ea9f551c439a518b0b' 
  AND token = 'G9yl6YvYkHPzJz9TS6T5Zpt1vC2bNsfV+5VU6UPUDvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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