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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02207253ae7644abcbe907f9b9c6214b2397781e00a0bbe0ae8ab8c150cb7d1b' 
  AND token = '25xB1nOdPBnKRrVyJzTbNTKIi3zPqqINCobgJRtIRNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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