Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '977a100eb1b84603aacf8664a5b33a63077d2f4417c47f2093e50359f4e72b61' 
  AND token = 'm6gmCZvq3CuJZsoiCbBp5bNtZyZ0PJcZTtkh5JcLbzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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