Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e44dab2f2d5b6ea7de5d236f40c56d3b550c949fca5bf576e63439fba796c4b' 
  AND token = '5MT9vVtelCrdxC5a4tn+SawZFHreshx7i+6YXuWnOWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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