Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e963df0b68f9200e644906c9832ed1d5302402b39d2927c8fbe03a5629f8cfd1' 
  AND token = 'DsjNacTaigrF9d5tV7+60NZ/6miKh3OTjoi2LVZCP5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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