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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29cd86a4b96845b8adfb870dee8c207c6a1195e85a9094248014c7cc0b54065a' 
  AND token = 'Hh+a4fW7mhKrxs0lYnhl6tjsav6J/Yg7ZJ8Ozo0HrbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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