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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b132ee33b3dc1eea3aa432c8436fcc0605eac00727191596167a80f8f72b020f' 
  AND token = 'qVUN83gjlgqdon19tm9AjHERybkDIUlxz49DDjFJ+Is=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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