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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa9bee55ac67d2ec2e749a569fbba4f26f522fb27907eabfeae58bf7aa409b26' 
  AND token = 'e5yDnUIV24pbEpDnHd5alOl5/8ucMFKfuN5IBsZ7yTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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