Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f60b6b031d88080ab0f1383ee553dbf6d2345d89e0903bed08306108179b994' 
  AND token = 'QX/gEN4Y2USHnm7W6clZ23hmkJIO25abAsp/rt+gASo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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