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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02293149e660ca6a30a330b53dfeace66ae3a7e5ea0df7914d07133aa4976db0' 
  AND token = 'eGfOynS0dDY8WPVZPu7Nq+jx9emqRrY8WW8DiFPJBXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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