Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b69c0e5f089018425efebdda1269c0f92b128998b4d69fd6386680004362974a' 
  AND token = 'ex6km4vKZnZ8w2OlhQb8JPWETRLTp2L83pSwhDNttDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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