Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de842eee6b1de98ecd6c6c68be80c72003b63896b09a92195f0dc25ed425f70e' 
  AND token = 'gc7N9ANMRm8T2XFFAWRR+AWQ0B5l19oj+Zab3OEl/F4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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