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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ee6750019862a67c3bf9814aa416699fa8f80f3e6ae681988d9d1a810adbe59' 
  AND token = 'TLibHI/QH52WWTfPuhIVrUBBceQvCGy6MSFrvZZuUL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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