SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e0c9d2b408afb4f42fd57d8b54cc89b1714254d93dcade7f887cae1154a67fa4' 
  AND token = 'j8hmFn/u619VdjKBpeZI3WNXSodDq+VYP8dLYBhh0oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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