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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b9fe5370a6446ca0c82cfac0bee7be4cbb1a4e80e08ba3d3e9571b69217515bc' 
  AND token = '2dv/25cqcFQQ41Zit0+UxWacuq2e1bGfJJ8X45ghb+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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