Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed32ef092ab437a4ede1ecb1caf3a7ec557a38df74eb2e82bafb1326965fce17' 
  AND token = 'NIWDZpnuoc8StBKHgBAmirWg23ktEp2fcl3LLnhSOoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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