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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72ad991a926278cc80a2e024c8f53aa815f515eb904ec6b90887b6d9b803062c' 
  AND token = 'H7YVBIFgsiQDONQY8PEqfzXLtoDQVRyge8pgcXKd6Ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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