Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fdd7d4ec5b679aebbf30bee8cc21a258f6f7d1fe7bbc91f69d58ef7cd9772f7' 
  AND token = 'lyRlBzijepS0V5025+VEcq1/IoA4J3JaLv/JgDPL4Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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