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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0982d2b2851e77350f4c8342ee892efae962f7d6257fe3ea00e23a9ee2ab7916' 
  AND token = 'H3w0aEMysencuNq2KVjL65zIB8kqLGv+gKhip2GscLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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