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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c472218ddc1e6c6beca77ef6e219a172d89bc2d8fa93af075ed0a93573e154e' 
  AND token = 'cbeiLrBdp6EA9K7EDP/DWmO+9/CM28QoGLdCIQznzsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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