Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e5c16899964cd6c4df03b200d5ab78d3f28008a2a7cbc590624ec6de18e5711' 
  AND token = 'HtPyc5ruIAgt1n1JitPOqh7udcJ2X+c7576i2wrNQvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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