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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd96c36ac720a3d758aaa131d8abcc00a7c462cab81e2658b6391cfcc11f605d1' 
  AND token = 'c/wGyuabbH03n3gPG2mPMsEtDrM3Ls0ovz1TYl6zI2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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