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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fd0ddb70cfa3f3a1da5f4a7bc52113f53ed00a6c38436ff2e22c2d63ef2c2ef' 
  AND token = 'jh7FMbzl59tViLTP4lsrpRMGK6iEPafKte1OvCFytmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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