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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06d574f666734839e338944e0c789f77adb4a1eb01ca071966980c003b9d7d8a' 
  AND token = '5J+uif1Tefwzr0ln7YxJURjJOe4MmoU0huNfYjAwlsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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