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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d26734f4d2ae80c230b27cae458e6bce3b508e6a61e0a16d886d2bfde07465b' 
  AND token = 'ELOZmzJBnb0vn1rkdYr7OBHgV87J9Ur9r5az0WjSrAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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