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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb62bc87cf5b800c33ef57f37433d9de6a1538e5769d062a81f1203c94e1b54d' 
  AND token = 'UHTYCS3HimcLe5usW4Au+GjmVWlnw8b5miOiHLywTGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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