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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b27c1a3d7124ef739daac0ef034dec91ac9118c55d2cd6fc337ab5b4d7d9d02' 
  AND token = '22RPb4vyDhcFZtTSiL4CR5JM+MROTBb/A4UVpKWE+bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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