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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '32258229c2b5c0529e863b77072282d0e8d7ad252b457ab8dae01c8f9d47b5ff' 
  AND token = '2zlftNDNAob/j9M1rw9nNkQR6HFI7DKjxQDhAAKXR8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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