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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e2e64c2b44290b8b5337d6ad82f276ccc099135f663bc914538d579c7fc6fa1' 
  AND token = 'BOxN8O6EelMQ+bSLGRz4qLv4TeqQm/xB89dt9TAOfFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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