Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c610caef524e066ffb2d54cb1941ef518a2ece1dc271f57349d2bd831f294e3' 
  AND token = '++knqu0vefV9ZpNS6qidMujKlZAV4C721gR636j/wls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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