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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61d8f2cd126bdd49cf59c526f8d7d892dcbc8bb4bc3c54c0ad0d5220b0d37e51' 
  AND token = 'C1PYkqBetci3NxmV5ITSIh/woTHX4vKMXjWcOE/zZkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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