SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25cdf43576404a7cef00cf1f5b167d2d5bdb389152bb1696170109d65730bc4f' 
  AND token = 'lbBqwhPE/B00SEK0BYUBHFk1sR1O8iMrzlJH2tiwWFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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