Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bad8ac8f523b644972e70181d569ca3651f5b61e539e6556bdcaaf71ed8533c3' 
  AND token = 'cdGCd5tFcisbzppvHZsF9l1X4NyBWkFD3GMo9IeLa8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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