Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e3779f3abe834819f12b2a735c595edd931247c7900fd7f86bc9e91b88c191b' 
  AND token = 'z3Q1amB9sCKBMHLj6MfeGUoYLLbS0oeNPBh+LFdF7ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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