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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5c0fb332d9eb847082726a9cbee7f9fff1e3d0914fdefa8cb98be7a6f380dca' 
  AND token = 'gQd+H9rOF4K8gScdBaPJUv/Iytz47a4l4nqIsw0q+xQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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