Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '475b84a8216c52f0114debc1a2d239967d8ebac43a7825c395af2a5255e3fbef' 
  AND token = 'Yq6QzD5BrkcSdGC1WFxDDzibzWw4yeHk8F8wLHaWPLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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