Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c94e6d6a3aa7e6f934473b3e2690fbbadb009f3882c2386dc38dda1047d8a67' 
  AND token = 'QLneGogCnmmNvqDORkQxTfR8U34wPZe3plmG24qpRPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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