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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09d5c1a9f28b89ca8630e3433c18943c364e4e0d964acfa2ee0a55e9f88e25ce' 
  AND token = 'fVZk2Husfqf/yFayWtySS0jSa0M8zbyS17aB0F/OlpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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