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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9c8094d0c60d3baf0f987e80a5c5a780a3e2f1ef6e7ea8fd0d30bd9a0d29d8a9' 
  AND token = '84gcL2dUZSXNNw1uN35K9jE105GD8vuXthKqUEOHlt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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