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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec4a6ec93b6cc87b5a9b8dd687b749a26ea4133e34ecf48345aad6349c61b05c' 
  AND token = '1LHO+8ZHJ8q7UuQrmJ4G6sV00nrkN6x4TYxp8a+miUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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